Located in
data/org.gnome.Mines.appdata.xml.in:9 data/org.gnome.Mines.desktop.in:4

3.

English:

GNOME Mines is a puzzle game where you search for hidden mines. Flag the spaces with mines as quickly as possible to make the board a safer place. You win the game when you’ve flagged every mine on the board. Be careful not to trigger one, or the game is over!

Current
Zulu:

(no translation yet)

Located in
data/org.gnome.Mines.appdata.xml.in:11

4.

English:

You can select the size of the field you want to play on at the start of the game. If you get stuck, you can ask for a hint: there’s a time penalty, but that’s better than hitting a mine!